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20″ Concept Thunderbolt


Can be delivered nationwide fully assembled for an extra €35.00.

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Description / Specification

Concept Thunderbolt 6 Speed 20″ Wheel Boys Bicycle

Another new junior bike from the clever bike geeks at Insync. This one is a cool customer, designed for the boy bike rider who wants to try some offroad riding. It’s fitted with powerful front and rear V-type brakes, steel wheels with mountain bike tyres that will also give a good ride on tarmac surfaces. Finished in a exclusive blue colourway with subtle decals.


  • V Type brakes for an improved braking performance.
  • 20″ Wheels.
  • Junior non-slip pedals prevent feet slipping off.
  • High rise handlebars help to promote a good riding position and ensure children are more aware of their surroundings.
  • Adjustable brake levers which can be easily operated by smaller hands.
  • Grips made from a softer dual compound for quality and comfort.
  • Boys Mountain Bike Saddle.
  • This bike features stand out styling on the frame.


  • Frame: Steel 20″ wheel boys.
  • Fork: Steel Rigid 20″ Wheel.
  • Headset: Steel Full Ball Bearing.
  • B.B Set: 9 pieces.
  • Handlebar: Steel 520mmL 60mm Rise.
  • Stem: Steel MTB Type.
  • Grips: PVC MTB Type.
  • Front Brake: V Type.
  • Rear Brake: V Type.
  • Shifter Right: Microshift (6 Speed).
  • Rear Derailleur: Power short cage.
  • Chain: 3/32” x 1/2” x 86L.
  • Chainset: Steel 3/32″ x 36T.
  • Tyres Front: 20” x 2.10” MTB Pattern.
  • Tyres Rear: 20” x 2.10” MTB Pattern.
  • Rims: Steel 20″ x 14G x 36H.
  • Front Hub: Steel 36H.
  • Rear Hub: Steel 36H.
  • Saddle: Boys MTB Black .
  • Seat Clamp: Washer & Dome Nut.
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